Importance of Slump Test in the Construction

The Slump Test is perhaps the most widely used because of the simplicity of the apparatus required and the test procedure. The slump test indicates the behavior of a compacted concrete cone under the action of gravitational forces. The slump test is a practical means of measuring the workability. Changes in the value of slump obtained during a job may indicate changes in materials in the water content or in the proportions of the mix. So it is useful in controlling the quality of the concrete produced.

The test carried out with a mould called the slump cone. The slump cone is placed on a horizontal and non absorbent surface and filled in three equal layers of fresh concrete. Each layer being tamped 25 times with a standard tamping rod. The top layer is struck off level and the mould is lifted vertically without disturbing the concrete cone.  The subsidence of concrete in millimeter is termed the slump. After the test, slumps evenly all around is called true slump.

In the case of very lean concrete, on half of the cone may slide down the other which called a shear slump or it may collapse in case of very wet concretes. The slump test is essentially a measure of consistency or the wetness of the concrete.

There are recommended slump for every concrete usage. Below are the table used to qualify a concrete mix.

Jeddah Tower- The Tallest Building In the World in the Making!

Jeddah Tower - The Tallest building in the World in the making. Located at Jeddah, Kingdom of Saudi Arabia. This is an ambitious dream of saudians, To surpass among the tallest building in the world. 

Destined to be the world's largest skyscraper, the 3,280-foot-tall Kingdom Tower will be the centerpiece and first construction phase of the under-development Kingdom City in Jeddah, Saudi Arabia. The building will be 568 feet taller than the world’s current tallest building, Dubai’s 2,722-foot-tall Burj Khalifa.

Inside Kingdom Tower, also known as Jeddah Tower, will house a Four Seasons hotel, Four Seasons-serviced apartments, office space, luxury condominiums, and what is expected to be the world’s highest observatory. The complex will have 59 elevators, which includes 54 single-deck and five double-deck elevators, and 12 escalators. At level 157, you'll find a sky terrace that's nearly 98 feet in diameter. (Though the outdoor amenity is intended for use only by the occupant of the penthouse floor. Alas.) Adrian Smith + Gordon Gill Architecture are the masterminds behind the $1.5 billion skyscraper; the firm also designed the master plan for 23-hectare Kingdom Tower Waterfront District that surrounds the tower. 

The outdoor space will include shopping malls and other amenities that give Kingdom City a neighborhood-y, pedestrian-friendly experience.Upon its predicted completion in 2020, the skyscraper will be an architectural landmark and economic symbol for the region. It will also be culturally significant: The southeast part of Kingdom Tower is in a direct line with Kaaba in Mecca, Islam's holiest site.